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wavelength-dispersive spectrometers

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006770
EISBN: 978-1-62708-295-2
... on the operating principles and applications of detectors for x-ray spectroscopy, namely energy-dispersive spectrometers, wavelength-dispersive spectrometers, and handheld x-ray fluorescence systems. The processes involved in x-ray analysis in the SEM and handheld x-ray fluorescence analysis are then covered...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003529
EISBN: 978-1-62708-180-1
... a second (less common in commercial laboratories) choice for the x-ray spectrometer: the wavelength-dispersive spectrometer, or WDS. The main difference between the EDS and WDS microprobe techniques is the method of detecting the x-rays. The original design by Castaing utilized a wavelength-dispersive...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001490
EISBN: 978-1-62708-232-7
... Around the perimeter of the hole the steel exhibited a very unusual set of microstructural bands, Figures 5 , 6 , and 7 . Based on the appearance and on energy-dispersive x-ray (EDX) microprobe spectra, Figures 8 and 7 , and on the wavelength spectrometer analysis of oxygen, Figure 9...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003522
EISBN: 978-1-62708-180-1
... that can simultaneously count and determine the energy of emitted x-rays. Such an energy-dispersive detector contrasts with the wavelength-dispersive spectrometers used on the original electron probe microanalyzer developed by Castaing in 1948. The x-rays are generated when a sample of the area of interest...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
... Analysis Energy-dispersive x-ray analysis is normally conducted using an SEM fitted with an x-ray detector that can simultaneously count and determine the energy of emitted x-rays. Such an energy-dispersive detector contrasts with the wavelength-dispersive spectrometers used on the original electron...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006759
EISBN: 978-1-62708-295-2
... and then digesting them in acid ensures that an adequate specimen is ready for analysis. Among bulk techniques, EDS and wavelength-dispersive spectroscopy (WDS) can be considered when a wide area scan is used to collect and analyze data. Because these techniques involve detectors in a scanning electron microscope...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006766
EISBN: 978-1-62708-295-2
... wavelength intervals. These intervals, termed emission lines, form a pattern—the emission spectrum—that is characteristic of the atom generating it. For OES, the energetic environment is typically a plasma, and the device used to produce such a plasma is commonly termed an emission source ( Ref 2...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
..., the composition can be determined. The precision and accuracy of the determination depends on the type of x-ray detector used and how the analysis is carried out. Detectors that determine composition based on the wavelength of the emitted x-ray are termed wavelength-dispersive spectrometers (WDS). Using WDS...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003534
EISBN: 978-1-62708-180-1
...: EDS, energy-dispersive spectroscopy; WDS, wavelength-dispersive spectroscopy; AES, Auger electron spectroscopy; XPS, x-ray photoelectron spectroscopy; TOF-SIMS, time-of-flight secondary ion mass spectrometry; FTIR, Fourier transform infrared (spectroscopy) Understanding the various analytical...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003533
EISBN: 978-1-62708-180-1
... be determined. The precision and accuracy of the determination depends on the type of x-ray detector used and how the analysis is carried out. Detectors that determine composition based on the wavelength of the emitted x-ray are termed wavelength dispersive spectrometers or WDS. Using WDS and pure elemental...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001712
EISBN: 978-1-62708-234-1
... 4.58 4.57 3C 0.456 4.62 4.62 3F 0.436 4.57 4.57 Chemistry Chemical analysis was performed on the roll bodies and the roll ends to confirm alloy composition. These are shown in Table 2 . Analysis on bulk samples was performed using a Phillips PW2600 wavelength dispersive X-ray...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003520
EISBN: 978-1-62708-180-1
..., concentration gradients, phases, precipitates, and segregates. Minimum detectable limits are better and quantification is more precise by wavelength-dispersive analysis (WDS) than by EDS. Energy-dispersive analysis is faster, although WDS analysis has made substantial improvements in operational speed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001817
EISBN: 978-1-62708-180-1
... x-ray microanalysis, using wavelength- or energy-dispersive x-ray spectrometers for identification of compounds, which in turn may identify corrosives. These techniques are often used to analyze for the presence of contaminants on crack surfaces or at the roots of pits. More information...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... magnifications attainable, typically 5000 to 10,000×. In addition, SEMs are often equipped with microanalytical capabilities, for example, energy-dispersive x-ray spectroscopes (EDS). Chemical analysis can be helpful in confirming...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006785
EISBN: 978-1-62708-295-2
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006813
EISBN: 978-1-62708-329-4
..., silver nitrate tests may be performed on residues clinging to a pitted stainless steel surface to confirm the presence of chloride ions—a common cause of pitting. Wet chemical methods are often supplemented by the use of x-ray diffraction testing or electron probe x-ray microanalysis, using wavelength...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4